<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="text" v-model='name'>name
        <hr>
        <input type="text"v-model='ming'> ming
        <hr>
        {{all}}
    </div>
</body>
<script src="./vue.js"></script>
<script>
    const vm=new Vue({
        el:'#app',
        data:{
            name:null,
            ming:null,
            all:null
        },
        watch:{
            name(newvale){
                this.all=newvale+'6'+this.ming
            },
            ming(newvalue){
                this.all=this.name+'6'+newvalue
            }
        }
        
    })
</script>
</html>